Browsing Natural and Agricultural Sciences by Supervisor "Landman, Marile"

Browsing Natural and Agricultural Sciences by Supervisor "Landman, Marile"

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  • Assigning symmetry terms to molecular orbitals in asymmetric Fischer carbenes using FALDI in a theoretical study 
    Nel, Brent (University of Pretoria, 2021)
    Molecular orbitals (MOs) are one of the most useful tools available for explaining and describing the electronic structure of a chemical system. These MOs are obtainable through different means, which falls under two ...
  • Complexes of thiophene derivatives as potential metallomesogens 
    Thomas, Mary Solly (University of Pretoria, 2006-12-07)
    This study involves the synthesis and structural characterization of new metal complexes of thiophene derivatives that have (potential) liquid crystalline properties. Thiophene has been selected because of its stability ...
  • Fischer and N-heterocyclic carbene complexes of chromium(0) 
    Fraser, Roan (University of Pretoria, 2012-12-14)
    The central focus of this study was the synthesis, structural investigation and characterisation of multiple chromium carbene complexes. Fifteen novel chromium(0) complexes were synthesised. The synthesis of the primary ...
  • Fischer and N-heterocyclic carbene complexes of Group (VII) transition metals 
    Fraser, Roan (University of Pretoria, 2016)
    The synthetic methodology, structure characteristics and catalytic application of Fischer- and N-heterocyclic carbene (NHCs) complexes of the group VII transition metals were investigated. By using density function ...
  • Fischer and N-heterocyclic carbene complexes of tungsten(0) 
    Pretorius, René (University of Pretoria, 2012-12-14)
    The synthesis of novel Fischer and N-heterocyclic tungsten(0) carbene complexes was endeavoured in this study and resulted in the synthesis, isolation and characterisation of eighteen new complexes. Sixteen novel Fischer ...
  • Multimetal complexes of Fischer carbenes 
    Bezuidenhout, Daniela Ina (University of Pretoria, 2010)
    Fischer carbene complexes of the Group VI transition metals (Cr, Mo and W) containing at least two or three different transition metal substituents, all in electronic contact with the carbene carbon atom, were synthesized ...
  • The recovery of sulphur from waste gypsum 
    Nengovhela, Ryneth Nkhangweleni (University of Pretoria, 2009-04-07)
    Gypsum is produced as a waste product by various industries, e.g. the fertilizer industry, the mining industry and power stations. Gypsum waste disposal sites are responsible for the leaching of saline water into surface ...
  • Substituted Fischer carbene complexes of molybdenum(0) 
    Levell, Tamzyn J. (University of Pretoria, 2014)
    The synthesis and structure elucidation of fourteen novel Fischer ethoxy- and amino carbene complexes of molybdenum and chromium metals of the type [(CO)3L2M=C(X)R] were performed. Substitution of the parent pentacarbonyl ...
  • Synthetic investigation of Mn(I) and Re(I) N-heterocyclic carbene complexes 
    Van der Westhuizen, Belinda (University of Pretoria, 2010)
    The study involves synthetic approaches towards the preparation of novel NHC complexes of low valent rhenium and manganese transition metals. Diverse methods of synthesis were studied. The direct approach, in which the ...